session-ios/Signal/src/ViewControllers/OWSNavigationController.h
2017-08-21 10:10:22 -04:00

24 lines
719 B
Objective-C

//
// Copyright (c) 2017 Open Whisper Systems. All rights reserved.
//
#import <UIKit/UIKit.h>
// Any view controller which wants to be able cancel back button
// presses and back gestures should implement this protocol.
@protocol OWSNavigationView <NSObject>
// shouldCancelNavigationBack will be called if the back button was pressed or
// if a back gesture was performed but not if the view is popped programmatically.
- (BOOL)shouldCancelNavigationBack;
@end
#pragma mark -
// This navigation controller subclass should be used anywhere we might
// want to cancel back button presses or back gestures due to, for example,
// unsaved changes.
@interface OWSNavigationController : UINavigationController
@end